G-882 MARINE MAGNETOMETER

O CESIUM VAPOR HIGH PERFORMANCE – Highest detection rangeand probability of detecting all sized ferrous targets

O NEW STREAMLINED DESIGN FOR TOW SAFETY – Lowprobability of fouling in lines or rocks

O NEW QUICK CONVERSION FROM NOSE TOW TO CG TOW –Simply remove an aluminum locking pin, move tow point andreinsert. New built in easy carry handle!

O NEW INTERNAL CM-221 COUNTER MODULE – Provides FlashMemory for storage of default parameters set by user

O NEW ECHOSOUNDER / ALTIMETER OPTION

O NEW DEPTH RATING – 4,000 psi !

O HIGHEST SENSITIVITY IN THE INDUSTRY – 0.004 nT/√Hz RMSwith the internal CM-221 Mini-Counter

O EASY PORTABILITY & HANDLING – no winch required, singleman operation, only 44 lbs with 200 ft cable (without weights)

O COMBINE TWO SYSTEMS FOR INCREASED COVERAGE –Internal CM-221 Mini-Counter provides multi-sensor dataconcatenation allowing side by side coverage which maximizesdetection of small targets and reduces noise

Very high resolution Cesium Vapor performance is nowavailable in a low cost, small size system forprofessional surveys in shallow or deep water. Highsensitivity and sample rates are maintained for allapplications. The well proven Cesium sensor iscombined with a unique and new CM-221 Larmorcounter and ruggedly packaged for small or large boatoperation. Use your computer and standard printer withour MagLogLite™ software to log, display and print GPSposition and magnetic field data. The G–882 is thelowest priced high performance full range marinemagnetometer system ever offered.

The G-882 offers flexibil ity for operation from small boat,shallow water surveys as well as deep tow applications(4,000 psi rating, telemetry over steel coax available to10Km). The G-882 also directly interfaces to all majorSide Scan manufacturers for tandem tow configurations.Being small and lightweight (44 lbs net, without weights)it is easily deployed and operated by one person. Butadd several streamlined weight collars and the systemcan quickly weigh more than 100 lbs. for deep towapplications. Power may be supplied from a 24 to 30VDC battery power or the included 110/220 VAC powersupply. The tow cable employs high strength Kevlar

strain member with astandard length of 200 ft (61m) and optional cable lengthup to 500m with no telemetryrequired.A rugged fiber-woundfiberglass housing isdesigned for operation is allparts of the world allowingsensor rotation for work in equatorial regions. Theshipboard end of the tow cable is attached to an includedjunction box or optional on-board cable for quick andsimple hookup to power and output of data into anyWindows 98, ME, NT, 2000 or XP computer equippedwith RS-232 serial ports.

The G-882 Cesium magnetometer provides the sameoperating sensitivity and sample rates as the larger deeptow model G-880. MagLogLite™ Logging Software isoffered with each magnetometer and allows recordingand display of data and position with Automatic AnomalyDetection and automatic anomaly printing on Windows™printer! Additional options include: MagMap2000 plottingand contouring software and post acquisition processingsoftware MagPick™ (free from our website.)

G-882 with Weight CollarDepth Option & Altimeter

The G-882 system is particularly well suited for thedetection and mapping of all sizes of ferrous objects.This includes anchors, chains, cables, pipelines, ballaststone and other scattered shipwreck debris, munitions ofall sizes (UXO), aircraft, engines and any other objectwith magnetic expression. Objects as small as a 5 inchscrewdriver are readily detected provided that the sensoris close to the seafloor and within practical detectionrange. (Refer to table at right).

The design of this high sensitivity G-882 marine unit isdirected toward the largest number of user needs. It isintended to meet all marine requirements such asshallow survey, deep tow through long cables,integration with Side Scan Sonar systems andmonitoring of fish depth and altitude.

Typical Detection Range For Common Objects

Ship 1000 tons 0.5 to 1 nT at 800 ft (244 m)Anchor 20 tons 0.8 to 1.25 nT at 400 ft (120 m)Automobile 1 to 2 nT at 100 ft (30 m)Light Aircraft 0.5 to 2 nT at 40 ft (12 m)Pipeline (12 inch) 1 to 2 nT at 200 ft (60 m)Pipeline (6 inch) 1 to 2 nT at 100 ft (30 m )100 KG of iron 1 to 2 nT at 50 ft (15 m)100 lbs of iron 0.5 to 1 nT at 30 ft (9 m)10 lbs of iron 0.5 to 1 nT at 20 ft (6 m)1 lb of iron 0.5 to 1 nT at 10 ft (3 m)Screwdriver 5 inch 0.5 to 2 nT at 12 ft (4 m)1000 lb bomb 1 to 5 nT at 100 ft (30 m)500 lb bomb 0.5 to 5 nT at 50 ft (16 m )Grenade 0.5 to 2 nT at 10 ft (3 m )20 mm shell 0.5 to 2 nT at 5 ft (1.8 m)

MODEL G-882 CESIUM MARINE MAGNETOMETER SYSTEM SPECIFICATIONSOPERATING PRINCIPLE: Self-oscillating split-beam Cesium Vapor (non-radioactive)

OPERATING RANGE: 20,000 to 100,000 nT

OPERATING ZONES: The earth’s field vector should be at an angle greater than 6from the sensor’sequator and greater than 6away from the sensor’s long axis. Automatichemisphere switching.

CM-221 COUNTER SENSITIVITY:<0.004 nT/ Hz rms. Up to 20 samples per second

HEADING ERROR: 1 nT (over entire 360spin )

ABSOLUTE ACCURACY: <2 nT throughout range

OUTPUT: RS-232 at 1,200 to 19,200 Baud

MECHANICAL:

Sensor Fish: Body 2.75 in. (7 cm) dia., 4.5 ft (1.37 m) long with fin assembly (11 in. cross width),40 lbs. (18 kg) Includes Sensor and Electronics and 1 main weight. Additional collarweights are 14lbs (6.4kg) each, total of 5 capable

Tow Cable: Kevlar Reinforced multiconductor tow cable. Breaking strength 3,600 lbs, 0.48 inOD, 200 ft maximum. Weighs 17 lbs (7.7 kg) with terminations.

OPERATING TEMPERATURE: -30F to +122F (-35C to +50C)

STORAGE TEMPERATURE: -48F to +158F (-45C to +70C)

ALTITUDE: Up to 30,000 ft (9,000 m)

WATER TIGHT: O-Ring sealed for up to 4,000 psi (9000 ft or 2750 m) depth operation

POWER: 24 to 32 VDC, 0.75 amp at turn-on and 0.5 amp thereafter

ACCESSORIES:

Standard: View201 Utility Software operation manual and ship kit

Optional: Telemetry to 10Km coax, gradiometer (longitudinal or transverse), reusable shippingcase

MagLog Lite™ Software: Logs, displays and prints Mag and GPS data at 10 Hz sample rate. Automaticanomaly detection and single sheet Windows printer support

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 12/06

GEOMETRICS INC. 2190 Fortune Drive, San Jose, California 95131, USATel: 408-954-0522 – Fax: 408-954-0902 – Email: sales@geometrics.com

GEOMETRICS EUROPE 20 Eden Way, Pages Industrial Park, Leighton Buzzard LU7 4TZ, UKTel: 44-1525-383438 – Fax: 44-1525-382200 – Email: chris@georentals.co.uk

GEOMETRICS CHINA Laurel Technologies, Ste 1807-1810, Kun Tai Int’l Mansion, #12B, Chaowai St. , Beijing 100020, ChinaTel: 86-10-5879-0099 – Fax: 86-10-5879-0989 – Email: laurel@laureltech.com.cn